Improvement in stopping mechanisms for spinning-jacks



2SheetsSheet1. W. W. SINCLAIR & E. GALVIN.

. STOPPING MECHANISM FOR SPINNING JACK. N'o.1-7Z,187. Patented Jan.11,1876.

WITNESSES: INVENTOB ATTURNEYS.

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'2Sheets- Sheet2. W. W. SINCLAIR & E. GALVIN. STOPPING MECHANISM FOR SPINNING JACK. No.172,187. Patented J'an.11, 1 876.

WITNESSES: 602V! [08; M (91? 144 y ATTIIBNEYS.

- N. PETERS, PHQTD-LITHOGRAPHEE WASHINGTON, D C.

UNITED STATES PATENT OFFICE.

WILLIAM W. SINCLAIR AND EDWARD GALVIN, OF MOTTVILLE, NEW YORK.

IMPROVEMENT IN STOPPlNG MECHANISMS FOR SPINNING'JACKS.

Specification forming part of Letters Patent No. 172,187, dated January 11, 1876 application filed I September I2, 1874. p

To all whom it may concern:

Be it known that we, WILLIAM W. SIN- OLAIR and EDWARD GAL-VIN, of Mottville, in the county of Onondaga and State of New York, have invented a new and Improved Stop-Motion for Spinning-Machines, of which the following is a specification:

The invention consists of automatic mechanism for throwing off the driving-belt of a spinning-j ack in case the squaring-band breaks or fails to act from looseness or other cause, which is always attended with considerable damage to the yarn and machinery. The shifter-lever has a strong spring attached 'to it for throwing it when released or tripped by the failure'of the squaring-band. to act. The said spring is held distended, ready for action, by the shifter-lever itself, which is lodged in a notch in a frame-piece, and is tripped by a sliding cam-rod when the band fails, and throws the belt-shifter. I Figure l is a plan view of the contrivance, in which a lever is used for the belt-shifter, and for holding the spring. Fig. 2 is a sectional elevation of Fig. 1, taken on the line at w.

' Fig. 3 is a plan view of a portion of a mule,

showing the application of our improved stopmotion. Fig. 4 is a side elevation, and Fig. 5 is an elevation taken at right angles to that of Fig. 4..

Similar letters ofreference indicate corresponding parts.

A represents the frame of a spinning-jack;

B, the frame or carriage, which travels on the,

track 0, and grooved wheels D D. a a are squaring-bands, which start from the tighteners I), pass around the doublegrooved pulleys E, and are commonly fastened to the frame at c 0 By means of these bands both endsof the carriage are compelled to advance with equal rapidity along the track 0. In the event of one or both of these bands breaking, the carriage, owing to its great length, is at once thrown from the track.

To obviate this difliculty, and to provide a means of stopping the jack instantly upon the breaking of a squaring-band, is the object of the present invention, which is as follows: v

The letter A, Fig. 1, represents the shifterlever for throwing off the driving-belt by actuating the shifter M, Fig. 4. The spring 0 throws the lever A to shift the belt when said lever is tripped out of the notch D, in which it" is set to be ready for throwing the belt. The lever is tripped out of the notch by the sliding cam E, which is moved to the right by the spring F when either of the squaringbands fails, one of the bands being connected to its spindle H by the cord G.

Having thus described our invention, we claim as new and desire to secure by Letters Patent- The combination, with squaring-band a a and belt-lever M, of cord G, spring-spindle H, trip-cam E, notch D, shifter-lever A, and spring 0, substantially as and for the purpose specified.

WILLIAM w. SINCLAIR. EDWARD GALVIN.

Witnesses:

DARIUS H. DE LANO, CHARLES M. BLODGETT. 

